Jig



J. B. BARBEE AND 0. J. CROSS.

APPLICATION FILED JUNE 25.1918.

1,328,778. Patented Jan. 20,1920.

2 SHEETS-SHEET 1.

James DBarbee Oflo lCross. 3111111111..

J. B. BARBEE AND 0. J. CROSS.

no. APPLICATION FILED JUNE 25.1918.

1,328,778, Y Patented Jan. 20,1920.

W H H ED STATES PATENT OFFICE...

JAMES B. BABBEE, OF CENTRAL CITY, AND OTTO J. CROSS, OF NEDERLAND, COLORADO-- J'IG."

' Specification of Letters Patent.

Patented Jamzo, 1920.

Application filed June 25, 1918. Serial No. 241,818.

This invention relates to mills, and more.

particularly to jiggers. It is one of the objects of the present invention to greatly increase the operating capacity of that type of milling apparatus involving a shaking jig screen by which o-re or pulp is segregated while immersed in water into portionsof different degrees of fineness and specific gravity.

Another object of the present invention is to provide an apparatus ofthis type which not only will have increased capacity in the amount of ore treated infa given time, but will also be economical in the use of wash water, and furthermore it is an object to provide a machine of this type in which the parts in comparison to the'amount of material efficiently treated are of such dimensions as to permit the plant to be readily transported and easily erected or dismantled as may be required.

A further and important" object of the present invention is not only i toprovide for the separation of terial from the ore pulp, separating it from the tailings, but also to provide for the continuous separation of middlings such for instance as heavy particles of the pulp of such size as to be rejected by the screen, but of such weight as not to be carried away in the tailings. l

With these and other objects in view, the invention consists of the construction, the combination, and in details and arrangements of the parts more particularly hereinafter described relative to the preferred embodiment of the invention. as is illustrated in the accompanying drawing, in which:

Figure 1 is a vertical section longitudinallv through the apparatus; v

Fig. 2 is a plan View of the jig tank and screen, the operating mechanism being eliminated;

the valuable fine ma- Fig. 3 is a cross section .onlines of.

Fig. 2 looking in the direction .of thear: row; and

Fig. at is a cross section on line 4-4 of Fig. 2 looking in the direction of thearrow.

The apparatus consists of atank 2 of any suitable material, proportion, design, and", construction, which is divided .by a partition 3 into two compartments, 2* and 2P,.the,lat-, ter of which is shown at 4: as provided with an adjustable gate for regulating thelevel of the water in the tank. The compartment. 2 of the tank. is .shownclearly. inqFig. 3' as being provided with communication. di-j rectly into the lower part ofanair chamber 2 formed byv a vertical longitudinal wall or. partition and beneath a suitable ceiling or, top portion 5, and in which air chamber air will .be compressed or collected .as .the water level rises above thelower edge of the cen-.-

tral wall'of the compartment 2 Mounted for shakingmovement preferably comprising vertical components, in the compartment .2 there is arrangeda suitable screen box 6 having a screen bottom ,7 of any suitable mesh and construction, the rim of the box being connected 'by any. suitable flexible diaphragm orother form of means to substantially close the top of the compartment 2 so as to make it almost air tight,the sealing means in. the present-,instance being shown as a fabricflstrip. 8 suit ably attached to the adjacentftop 5 andfsi'de and end walls of the compartmentQ. The shaking jig screen boxv 6 is. adapted to, be given its movement through any suitable form of mechanism, here shown as compris ing a rock shaft 10 connected by links 11 to eccentrics 12 on an eccentric shaft 13, by which mechanism the screen is reciprocated, while pulp is fed into the box andon tothe screen. 7 by any" suitable supply means. The tailings from the screen is floated ofi' through a discharge launder 15 extending through an opening provided therefor in the upper portion of the partition. 3, the launder in the present instance discharging onto a device which is designed .to carry away the solids of the tailings shown. as comprising a receiver 16 in the form of a wheelv rotated so as to carry the collected solids upwardly and discharge them onto a tail trough 17 by which they may be conducted away from the jig.

To permit the free to-and-fro pulsation or surging of the water. under the suction tendency created by the upward movement of the screen 7, the partition 3 is provided with a series of apertures 32 which preferably are provided with screens to retard the movement of the suspended particles in the tailings compartments and likewise the values from the screen compartments.

One of the important features of this invention resides in the provision of means for collecting the middlings or that over-size portion of the pulp which collects on the screen 7 during the operation of the mill because it is too large to pass through the screen and too heavy to pass into the tailings launder 15. To that end we provide in the central portion of the screen an outlet plate 18 having an aperture 18 and the size of which may be regulated by a shutter or valve 19. To the baflie or discharge plate 18 there is connected a hood 20, the bottom of which is open to receive a discharge pipe 21 having a' gate valve 22 at its lower end. To prevent the discharge of the middlings or oversize particles into the compartment 2 below the screen, a deflector or guard plate 23 is shown as attached to one side of the discharge plate 18 adjacent the opening thereof, this deflector 23 overhanging the mouth at the upper end of the discharge tube 21.. At the end of the screen 7 adjacent the launder 15 there is also provided a fixed discharge plate 18 having an adjustable 'gate or valve member 19 for regulating therate of discharge or size of the aperture therefrom. I

From the above general description of the apparatus, its operation may be briefly described as follows:

Pulp is fed into the screen box 6 while the latter is reciprocated and on the upward vertical movement of the screen there is created a suction in the water in the compartment 2 so that there is a movement of the water from the compartn'ient 2 into the compartment 2 and also from the air chamber downwardly so that on the downward stroke of the screen 7 the pulp is subjected to the upward rushing current of water and is therefore lifted to a considerably higher degree than would be the case if the screen compartment were freely open to the atmosphere. Conversely on the upward movement of the screen there is a strong downward action of the re-surging water which acts stronglyto separate the finer particles and draw them through the screen. It will be seen therefore that through the present system the bed of pulp is more violentlyv agitated than in forms of shaking screens in which the closed chamber is'not employed.

tank having a transverse partition forming at one end of the tank a tailings chamber a longitudinal partition of less depth than the vertical depth of the tank in the plane of the partltiou, a cover forming with the partition and the tank walls an air chamber, a igging? screen mounted in the tank along the other side of the partition and substantially at the top thereof, and having a discharge projecting into the tailings chamber, the transverse partition apertured to provide for equalization of water level between the several chambers, the motions of the screen pulsating the water between the air chamber and its own compartment to facilitate the treatment of. the pulp.

2. A pulsating jigger comprising a water tank ha ing a transverse partition forming at one end of the tank a tailings chamber, a longitud-nal partition of less depth than the vertical depth of thetank in the plane of the partition, a cover forming withthe partition and the tank walls an air chamber, a jigging screen mounted in the tank along the other side of the partition and substantially at the top thereof, having a discharge prcjecting into the tailings chamber, the transverse partition apertured to provide for equalization of water level between. the severa-l chambers, the motions of the screen pulsating the water between the air chamber and its own compartment to facilitate the treatment of the pulp, and adjustable means for regulating the pulsations by changing the degree of compression of air in the air chamber.

3. In anapparatus of the character described, atank having a tailing-s chamber at one end, and longitudinally extending parallel compartments each of whichis substantially sealed at its top, one by a cover and the other by a vertically movable jigging screen, the parallel compartments separated by a partition. extending from the top of the tank downward and teri'ninating short of the bottom of the tank so that Water will pulsate, when the screen is reciprocate'd, to and from the adjacent compartment and compressair therein, and means providing for the substantial equalization of the water level in the several chambers.

In testimony whereof we ofiix our signatunes. a

JAMES B. BARBER OTTO J. CROSS 

